http://pagead2.googlesyndication.com is pissing me off. What is the deal with these ads on myspace.com or dialidol.com

If you "sit" on a page, it will load new ads, and then you have to click on the back button several times just to go back one page...
I don't like this at all. As users, we need to stand up to this form of advertising. Hopefully, I browser (Opera) will come up with a way to disable this ad functionality.